ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
"13F equity value" = market value of this filer's US-listed long equity positions only. It excludes cash, bonds, non-US and short positions, so it understates a fund's true assets under management — often by a lot.
13F holdings are disclosed ~45 days after quarter-end, and they never reveal when within the quarter a fund actually bought. So any 13F-based summary is structurally late and blurred — this applies to every fund, including this one.
We backtested copying it anyway. Buying this fund's new positions the day each filing went public, over 37 quarters, returned +1.6% per quarter — versus +2.0% per quarter from simply owning every 13F stock. It beat that baseline in only 43.2% of quarters (excess t = -0.61, not statistically significant). Its filings tell you what it bought — not what you should buy.
Quarterly compounding, invested quarters only · entry after the actual SEC deadline plus a 2-day buffer
Top 20 holdings of 1887 · 2026 Q2
| Ticker | Value | Weight | QoQ |
|---|---|---|---|
| MSFT | $10.3B | | ADD +14% |
| AMZN | $9.6B | | ADD +24% |
| AAPL | $8.6B | | ADD +54% |
| NVDA | $7.0B | | ADD +9% |
| GOOGL | $5.4B | | TRIM −12% |
| LRCX | $5.3B | | TRIM −7% |
| GOOG | $5.1B | | HOLD |
| SNDK | $4.9B | | TRIM −23% |
| AVGO | $3.2B | | TRIM −54% |
| 0QNI.L | $2.9B | | TRIM −11% |
| PLTR | $2.4B | | ADD +96% |
| CSCO | $2.3B | | ADD +10% |
| MA | $2.2B | | ADD +16% |
| APH | $2.1B | | HOLD |
| CRM | $2.1B | | ADD +5% |
| STX | $2.1B | | ADD +49% |
| FTNT | $1.6B | | ADD +5% |
| ISRG | $1.5B | | ADD +78% |
| ARM | $1.5B | | ADD ×4.3 |
| SU | $1.4B | | ADD +3% |
QoQ vs previous quarter's share count · NEW = new position · ADD/TRIM = ±2% shares · HOLD = unchanged.
New positions in 2026 Q2
Method & Limitations
Method: a "new position" = held this quarter, absent last quarter (options excluded; stocks with <50 prior holders excluded to filter spin-off artifacts). Entry is the first trading session after the actual SEC filing deadline plus a 2-day buffer. Benchmark = equal-weighted universe of all 13F-held stocks. Limitations: quarterly snapshots can't see intra-quarter trades; survivorship bias — funds that shut down are absent, which flatters the sample. Statistics, not advice.